Pseudomorph Goethite After Marcasite | Prophecy Stone | 72 gr | Farafra Oasis, Egypt | SO24 Perky Box Name: Agrellite and Eudialyte

Name: Agrellite and Eudialyte

It is found only in South Africa and Its colors range from white

Its dimensions are 44x42x23mm

Color: Rich Purple

Pseudomorph Goethite After Marcasite | Prophecy Stone | 72 gr | Farafra Oasis, Egypt | SO24 Perky Box Name: Agrellite and EudialytePseudomorphs are mineral specimens that have the external shape of one mineral but are composed of another. The pseudomorph goethite after marcasite forms when marcasite is exposed to oxidizing conditions and starts to oxidize and break down. As the marcasite breaks down, goethite replaces it in the crystal structure, preserving the shape of the original marcasite crystal. The resulting specimen appears as a marcasite crystal, but is actually composed